package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealMapper setmealMapper;

    /**
    * 新增分类
    * */
    @Override
    public void save(CategoryDTO categoryDTO) {
        // CategoryDTO -> Category
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO, category);

        // 设置当前记录状态为正常
        category.setStatus(StatusConstant.ENABLE);

        //设置当前记录创建时间和修改时间
        //category.setCreateTime(LocalDateTime.now());
        //category.setUpdateTime(LocalDateTime.now());

        //设置当前记录创建人和修改人
        //category.setCreateUser(BaseContext.getCurrentId());
        //category.setUpdateUser(BaseContext.getCurrentId());

        categoryMapper.insert(category);
    }


    /**
    * 分页查询分类
    * */
    @Override
    public PageResult page(CategoryPageQueryDTO categoryPageQueryDTO) {
        PageHelper.startPage(categoryPageQueryDTO.getPage(), categoryPageQueryDTO.getPageSize());
        Page<Category> page = categoryMapper.pageQuery(categoryPageQueryDTO);
        long total = page.getTotal();
        List<Category> records = page.getResult();
        return new PageResult(total, records);
    }

    /**
    * 删除分类
    * */
    @Override
    public void delete(Long id) {
        // 判断当前分类下是否有菜品
        int count = dishMapper.countByCategoryId(id);
        if (count > 0) {
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        //查询分类是否关联了套餐,如果关联了套餐,不允许删除
        count = setmealMapper.countByCategoryId(id);
        if(count > 0){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        //删除分类
        categoryMapper.deleteById(id);

    }

    /**
    * 根据类型查询分类
    * */
    @Override
    public List<Category> list(Integer type) {
        return categoryMapper.list(type);
    }


    /**
    * 修改分类
    * */
    @Override
    public void update(CategoryDTO categoryDTO) {
        // CategoryDTO -> Category
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO, category);

        //设置当前记录修改时间和修改人
        //category.setUpdateTime(LocalDateTime.now());
        //category.setUpdateUser(BaseContext.getCurrentId());

        categoryMapper.update(category);
    }


    /**
    * 启用禁用分类
    * */
    @Override
    public void startOrStop(Integer status, Long id) {
        Category build = Category.builder()
                .status(status)
                .id(id)
                .build();
        categoryMapper.update(build);
    }


}
